[time-nuts] Re: dial-up time source for NTP

[Jeremy Elson]

I think NIST still runs a dialup time server after all these years:

https://www.nist.gov/pml/time-and-frequency-division/time-distribution/automated-computer-time-service-acts

On Tue, Aug 9, 2022 at 5:56 PM Avro125 via time-nuts <
time-nuts at lists.febo.com> wrote:

> Hello;
>
>
>
> I’m wondering if someone would be willing to assist me in getting NTP to
> reference time from NIST (Colorado) or NRC (Ottawa) via a dial-up modem.
> Either as a primary source, or as a failover in case the GNSS signal is
> lost.
>
>
>
> I have several commercial GPS-referenced clocks operating as primary NTP
> servers, however also employ a few Raspberry Pis as experimental boxes so
> that I can trial different GNSS antennas, constellation combinations, etc.
> I would like to get one of the Pis to use a hardware USB modem to dial out
> every so often to obtain the time via the telephone network.
>
>
>
> Right now the Pi in question has a GNSS RTC board on it and is working well
> in that capacity.  I’d like to add the modem in, and this is where I’ve run
> into a wall.
>
>
>
> Is there anyone who’s done this and would be able to help me get this Pi up
> and running?  The modem is connected and the Pi can see it, but NTP doesn’t
> seem to be dialing out.  I think I’m missing a config file or two.
>
>
>
> You can contact me off-list if this is too off-topic for the group.
>
>
>
> Thanks,
>
>
>
> Avro
>
> avro125 at gmail.com
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